A backpack with a compression system includes a backpack body having a top side, a bottom side, two lateral sides, a body side, an outer side and a pair of shoulder straps. Each shoulder strap has a first end connected at a junction of the top side and the body side, and a second end con

One aspect of the invention involves the output of a radio frequency (RF) identification tag by a writing instrument to indicate ink color or another characteristic associated with a line style parameter of the writing instrument. The RF identification tag is a wireless signal that u

One aspect of the invention involves a writing tablet comprising a housing having a writing surface and internal logic placed within the housing and situated below the writing surface. The internal logic includes imaging sensor, a light source and a controller. The imaging sensor is adap

One aspect of the invention relates to an electronic writing device for interactive teaching of users to reproduce a selected graphical representation. The electronic writing device comprises a casing, a screen and internal logic placed within the casing. The internal logic controls

The inkjet stylus includes a nozzle for depositing ink onto a writing surface. The ink is drawn from an ink cartridge, which may contain a plurality of ink containers, each holding a different color ink. A switch mechanism is used to select different combinations of ink to produce di

A digital messaging pen includes a writing nib that a user can use to write a message. The digital messaging pen captures the message. The user then selects a destination for the message, and the digital messaging pen transmits the message to the destination.